Electric sterilizer.



PATENTED MAY 21, 1907.

J. B. WANTZ. ELECTRIC STERILIZER.

APPLIOATION FILED MAB. 9, 1907.

2 SHEETSSHEBT 1.

No, 854.318. PATENTED MAY 21, 1907.

J. B. W-ANTZ. ELECTRIC STERILIZER.

APPLIOATION FILED MAR. 9,1907.

2 SHBETS-SHEET 2.

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Julius B. WANTZ, or GHICAGO, ILLINOIS, ASSIGNOR TO VICTOR ELEO'rRIO COMPANY, OF GHIGAGO, LLiN-ors, A CORPORATION OF ILLINOIS.

ELECTRIC STERILIZER.

Specification of Letters Patent.

Patented May 21, 1907.

Application filed March 9,1907. Serial llo- 361.424.

' To alt whom it may concern:

, the construction of such a sterilizer in 1nattons of detail, hereinafter described, to the end of mcreasmg its efhciency, especially as to readiness of heating the sterilizing liquid (usually water or a suitable aqueous chemical solution), of facilitating the removal of the resistancecoils, and Of economizing in current by adapting one or more of the coils employed to be cut out of circuit while leaving therein the other or others to furnish sufficient heat for ke'e )ing the liquid hot while the use of the sterilizer is temporarily interru ted.

-n the accompanying drawing, Figure 1 shows my improved sterilizer by a view in end elevation with both resistance-coils in service; Flgh 2 is a similar view of the same,

but with one of the coils out of service; Fig.

3, a section taken at the line 3 on Fig. 4 and viewed in, the direction of the arrow,-and Fig.

, larged'.

4, a section taken at the line 4 on Fig. 1, viewed in the direction of the arrow and en- The r'eceptacle'b, which is preferably 1 formed of sheet-metal in the oblong rectangular sha e represented, has an in-set bottom 5 c approximate W-shape in crosssection, affording longitudinal concave'parallel recesses or troughs in its upper side to conform to the cylindersof the resistancecoils 6 and v7 for thepur ose hereinafter described. -The coils,whic are alike, are each composed of a tube 8 of rcfi actory material having wound about and embedded in it an electrical resistance wire 9, the tube being'ineased in a hollow sheet-metal cylinder 1Q with a filling of granular heat-retaining ma: terial 11', such as white sand, within it about being connected with the inner projecting osts, each pair havin an a erture 25 in its headadapted to beintroduced into the socket of; an incandescent electric lamp.' The wires;

the tube 8. The outer head 12 of each coil, composed of a plate ofslate, or other suitable refractory and electrically insulating material, and the inner head 13, consistingof a plate of similar material, are rigidly fastened to the coil-ends by a rod 14 passinglongitudinally and centrally through end-bearings 15 in it and through the heads, and secured by nuts on its threaded ends, the nut on the outer end forming a binding-post 16; and a similar binding-post 17 being fastened on a screw 18 in the head 12, with which one end of the wire 9 is connected, the opposite end 5 end of therod 14. The tubular coil-casings 10 extendfrom the heads 12' through the front wall of the receptacle, to which they are fastened, as by soldering, to the rear wall thereof, in which are provided, concentric with them, screw-plugs 19 for confining the sand 11, either of which may be readily withdrawn when it is desired to empty out the sand. say preparatory to removing a burnedou't coil for re lacing it with a new one. The heads 12 are astened to the front wall of the receptacle each by two screws 20 passing through its corner-portions These are readily removable to free the respective coil and peiiilnit it to be withdrawn through the front wa A tray 21 of numerously perforated and preferably galvanized sheet-metal, for sup porting the instrument to besterilized, fits rernovably inside the receptacle, seating upon the cylinders 10; and it is provided on its ends with bail-like rigid handles 22 by which to manipulate it. v

The two binding-posts 16 form a pair as do also the two posts 17, and the members of 9 each ear contain horizontal ahning aper- 'tures through which passes a connecting-pin 23 releasably fastene in place by set-screws 24 working in the outerends of the portion in whic to asten to it one of the two wires 26, 27, for connection with a suit-.

able source of electric current for supplyin the coils, as through the medium of the usua plug ,(not shown) on the free ends of. the wire,

an an. a- "no,

loving openings; in one 15 opposite ()5 sings fastened elm tlze base navnw are fastened in the p2'31-l1e...cls by biudi receptacle is Show mix a removable cover 5 dle 30.

.vith

nd rou h smd 7o '(JSlS enthe e L "P w lds ml the (Poll 80 he in said wable i" :1 lzllm m- 3 ins ders v "zed in the coepa'esen ol'ltmnmgeynn ulm h must ,whic

e tray, is r e loo -see in. itand the intarrow;so evelo of th here 0th be required. Thus 9. 15 sterilizin has to be 15 tin By providing "all n cross the l ter lute form 1' sfe of fiat, the coil-c purely enveloped 0 Water-space 1s 11 little Water, above the base only a pint w g we advantage of savil ing it.

1 com {H3 11-- ingstubular casings fastened in the recep taele to extend along the troughs of the bottom and coincide with said openings, resiste ance-eoils supported in said casings to be withdraweblethrough said openings and provlded With heads on their outer ends covermg said openings, sand heads carrying bind- JULIUS B. WANTS,

In presence of:

RALPH A. ScnAEFER,

KATHLEEN CORNWALL. 

